public class hello {
   public static void main (String args[]) {
     System.out.println("da jia hao!");
     System.out.println("Nice to meet you");
     Student stu  = new Student();
     stu.speak("We are students");
    }
}
class Student {
   public void speak(String s) {
     System.out.println(s);
   }
}

